2 * include/linux/random.h
4 * Include file for the random number generator.
7 #ifndef _LINUX_RANDOM_H
8 #define _LINUX_RANDOM_H
10 #include <linux/ioctl.h>
12 /* ioctl()'s for the random number generator */
14 /* Get the entropy count. */
15 #define RNDGETENTCNT _IOR( 'R', 0x00, int )
17 /* Add to (or subtract from) the entropy count. (Superuser only.) */
18 #define RNDADDTOENTCNT _IOW( 'R', 0x01, int )
20 /* Get the contents of the entropy pool. (Superuser only.) */
21 #define RNDGETPOOL _IOR( 'R', 0x02, int [2] )
24 * Write bytes into the entropy pool and add to the entropy count.
27 #define RNDADDENTROPY _IOW( 'R', 0x03, int [2] )
29 /* Clear entropy count to 0. (Superuser only.) */
30 #define RNDZAPENTCNT _IO( 'R', 0x04 )
32 /* Clear the entropy pool and associated counters. (Superuser only.) */
33 #define RNDCLEARPOOL _IO( 'R', 0x06 )
35 struct rand_pool_info {
41 /* Exported functions */
45 extern void rand_initialize_irq(int irq);
47 extern void add_input_randomness(unsigned int type, unsigned int code,
49 extern void add_interrupt_randomness(int irq);
51 extern void get_random_bytes(void *buf, int nbytes);
52 void generate_random_uuid(unsigned char uuid_out[16]);
54 extern __u32 secure_ip_id(__u32 daddr);
55 extern u32 secure_tcp_port_ephemeral(__u32 saddr, __u32 daddr, __u16 dport);
56 extern u32 secure_tcpv6_port_ephemeral(const __u32 *saddr, const __u32 *daddr,
58 extern __u32 secure_tcp_sequence_number(__u32 saddr, __u32 daddr,
59 __u16 sport, __u16 dport);
60 extern __u32 secure_tcpv6_sequence_number(__u32 *saddr, __u32 *daddr,
61 __u16 sport, __u16 dport);
62 extern u64 secure_dccp_sequence_number(__u32 saddr, __u32 daddr,
63 __u16 sport, __u16 dport);
66 extern struct file_operations random_fops, urandom_fops;
69 unsigned int get_random_int(void);
70 unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
72 #endif /* __KERNEL___ */
74 #endif /* _LINUX_RANDOM_H */